I know the cabinetmaking world better than the carpentry world and for what I know, there's not a lot of work and quite possible to end up without a job after apprenticeship. That is why many of these guys go to Canada to work, even temporarily, then can come back having a bit of an edge on the competition because they have that experience and speak a little more English. It seems like most of the guys I knew in Canada who went back are not working in cabinetmaking here, they are working in marketing or project managing or gone back to school or something like that.
I met two of the traveling carpenters about a month ago. They told me they were actually cabinetmakers but no work in that but better to find work in housebuilding. I am talking about the ones in the black clothes that walk around for 3 years and work in different places, see
http://www.abss-shop.de/grafik-seo/Zunft-abss.jpg
You can also get zeitarbeit once you have a trade if you can't find work but it's lower paid than having a real job and you may get moved around a lot.